如何根据 python 中的日期和时间并按日期和时间排序 plot 数据？

Question

I have two lists, one containing datetime elements and another containing numerical values. I want to plot a scatter plot in which the X axis is the date and the Y axis is the numerical value. The format of the datetime is the next: "YYYY-MM-DD HH:mm:ss".

datetimes = ['2015-01-10 10:00:00', '2015-01-11 10:00:00', '2015-01-10 11:00:00', '2015-01-10 10:30:00']
numerical_values = [3.0, 2.0, 10.0, 4.0]

How can I plot the scatter ordered by datetimes?

Answer 1

You can sort your lists and keep track of your coordinate doing:

datetimes = ['2015-01-10 10:00:00', '2015-01-11 10:00:00', '2015-01-10 11:00:00', '2015-01-10 10:30:00']
numerical_values = [3.0, 2.0, 10.0, 4.0]

x_y = sorted([(x,y) for (x,y) in zip(datetimes,numerical_values)], key=lambda z: z[0])

x = []
y = []

for X, Y in x_y:
    x.append(X)
    y.append(Y)